Design return periods applicable to offshore oil and gas facilities are governed by national regulations or industry codes. For guidance specific to PRIME ENERGY projects, refer to Company Standard 28842.ENG.OFF.STD “Meteo-Oceanographic Design Basis”.No PVT experiments have yet been conducted on recovered cores from PROJECT ALPINE. Fluid characterization was therefore derived from MDT sampling at T-090, with analysis performed at 2,487 m depth, 3,903 psia reservoir pressure, and 151 °F reservoir temperature. Results indicate a methane-rich gas (C1 content 98.3%), with a gas gravity of 0.58 and condensate–gas ratio (CGR) of 5.8 stb/MMscf. The dataset was calibrated through an equation-of-state model (PVTi), and the T-090 fluid properties are currently applied to secondary reservoirs for preliminary design.